package risoe.syslab.fhnew.hw.enocean3;

/*
 * Copyright (c) 2012-2014, Technical University of Denmark (DTU)
 * All rights reserved.
 * 
 * The Flexhouse 2.0 platform ("this software") is licensed under the
 * BSD 3-clause license.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *   - Neither the name of DTU nor the names of its contributors may be used to
 *     endorse or promote products derived from this software without specific
 *     prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE TECHNICAL UNIVERSITY OF DENMARK BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * Code courtesy of IoTSyS
 * https://code.google.com/p/iotsys/
 * @TODO Put proper copyright header here
 */

public class ESP3Telegram
{
	public enum RORG
	{
		RPS(0xF6),
		OneBS(0xD5),
		FourBS(0xA5),
		VLD(0xD2),
		MSC(0xD1),
		ADT(0xA6),
		SM_LRN_REQ(0xC6),
		SM_LRN_ANS(0xC7),
		SM_REC(0xA7),
		SYS_EX(0xC5);

		private byte value;

		private RORG (int value)
		{
			this.value = (byte)(value & 0xFF);
		}

		public byte getValue ()
		{
			return value;
		}

		public static RORG checkValue(int value)
		{
			RORG[] allTypes = RORG.values();
			byte rorgByte = (byte)(value & 0xFF);

			for (RORG rorgType : allTypes)
			{
				if ( rorgType.value == rorgByte )
				{
					return rorgType;
				}
			}
			return null;
		}
	}

	public static final int ESP_RORG_LENGTH = 0x01;
	public static final int ESP_STATUS_LENGTH = 0x01;

	public static final int ESP3_RORG_POS = 0x00;

	byte[] data;
	private RORG rorg;
	@SuppressWarnings("unused")
  private int dataLen;
	@SuppressWarnings("unused")
  private int optDataLen;
	private DeviceID senderID;

	public ESP3Telegram (byte[] data, int dataLen, int optDataLen)
	{
		this.data = data;
		this.dataLen = dataLen;
		this.optDataLen = optDataLen;
		this.senderID = getSenderIDFromDataGroup();
		this.rorg = getRORGFromDataGroup (data);

	}

	public static RORG getRORGFromDataGroup (byte[] data)
	{
		if (data == null)
			return null;

		return RORG.checkValue(data[ESP3_RORG_POS] & 0xFF);
	}

	private DeviceID getSenderIDFromDataGroup ()
	{
		byte[] senderIDBytes = new byte[DeviceID.ID_LENGTH];
		System.arraycopy (data, ESP_RORG_LENGTH + 1, senderIDBytes, 0, DeviceID.ID_LENGTH);

		return DeviceID.fromByteArray(senderIDBytes);
	}

	public RORG getRORG()
	{
		return rorg;
	}

	public DeviceID getSenderID()
	{
		return senderID;
	}

	public byte[] getPayload()
	{
		byte[] payload = new byte[1];

		System.arraycopy (data, ESP_RORG_LENGTH, payload, 0, 1);
		return payload;
	}

	public String getPayloadAsString()
	{
		StringBuilder builder = new StringBuilder();

		byte[] payload = getPayload(); 

		for (int i = 0; i < payload.length; i++)
		{
			builder.append(String.format("0x%02X", payload[i]));
		}

		return builder.toString();
	}

	public byte getStatusByte()
	{
		return data[ESP_RORG_LENGTH + 1 + DeviceID.ID_LENGTH];
	}

}